Uplink Control Information Transmission via Priority Selection
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Solution Overview
Problem
In radio communication systems employing carrier aggregation, determining the appropriate uplink component carrier (UL CC) for transmitting uplink control information (UCI) is challenging, leading to suboptimal system performance and increased complexity, especially when multiple PUSCH transmissions occur in a subframe.
Innovation Solution
The method involves selecting an uplink shared channel for UCI transmission based on priority indications dynamically determined according to predetermined rules, considering system parameters like system load and interference, allowing intelligent choice of the UL CC for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple uplink component carriers are aggregated for carrier aggregation, then system capacity and throughput are improved, but determining the appropriate UL CC for UCI transmission becomes complex and suboptimal
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the selection of uplink component carrier based on varying system conditions. The UE determines which UL CC to use for UCI transmission by evaluating current system parameters such as interference levels, channel quality, and scheduling information, thereby adapting the transmission parameters to changing conditions rather than using a fixed selection method
Solution Approach 2:
The patent implements self-service through autonomous UE decision-making. The UE independently determines the appropriate uplink component carrier for UCI transmission without requiring complex network coordination or additional signaling overhead. The UE uses its own measurements and received scheduling information to make the selection, enabling the system to serve itself without external intervention
2Reliability
If priority indication information is dynamically determined, then system performance is optimized under varying conditions, but signaling overhead and processing requirements increase
Solution Approach 1:
The patent uses scheduling information as an intermediary mechanism to convey priority indication. Rather than introducing dedicated signaling for priority information, the system embeds priority indications within existing scheduling grants and uplink assignments. This intermediary approach allows priority information to be transmitted through the normal scheduling workflow without requiring separate signaling channels or increasing overall signaling overhead
Data Source
Figure 1
AI summary
Uplink control information transmission method, and a network node and a UE implementing the method are disclosed. According to an embodiment of the invention, uplink control information is transmitted from a UE to a network node by defining a set including at least one of the of uplink component carriers being usable for carrier aggregation for the UE. For this set, a priority indication is assigned to each one of the at least one uplink component carrier included in the set. Then, if this set includes at least one uplink component carrier comprising an uplink shared channel, one of these at least one uplink component carrier comprising an uplink shared channel is selected for transmission of uplink control information in that uplink shared channel. Selection based on at least one of the at least one assigned priority indication, when selecting uplink component carrier, is disclosed.